6418993420 has 48 divisors (see below), whose sum is σ = 15412864320. Its totient is φ = 2199757824.

The previous prime is 6418993411. The next prime is 6418993423. The reversal of 6418993420 is 243998146.

It is not an unprimeable number, because it can be changed into a prime (6418993423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 323136 + ... + 342424.

It is an arithmetic number, because the mean of its divisors is an integer number (321101340).

Almost surely, 2^6418993420 is an apocalyptic number.

It is an amenable number.

6418993420 is an abundant number, since it is smaller than the sum of its proper divisors (8993870900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6418993420 is a wasteful number, since it uses less digits than its factorization.

6418993420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21682 (or 21680 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 6418993420 is about 80118.6209317160. The cubic root of 6418993420 is about 1858.4703788323.

It can be divided in two parts, 64189 and 93420, that added together give a square (157609 = 397²).

The spelling of 6418993420 in words is "six billion, four hundred eighteen million, nine hundred ninety-three thousand, four hundred twenty".